Alright, let's work through 72206437 times 72267681 step by step
72206437 × 72267681 = 72267681 × (72206437)
+ 72267681 × 7 resulting in 505873767
+ 72267681 × 30 yielding 2168030430
+ 72267681 × 400 giving us 28907072400
+ 72267681 × 6000 which equals 433606086000
+ 72267681 × 00000 that is equal 0
+ 72267681 × 200000 that results in 14453536200000
+ 72267681 × 2000000 resulting in 144535362000000
+ 72267681 × 70000000 what gives us 5058737670000000

= 5218191755262597
